1 Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, Korea.
2 Division of Maternal and Fetal Medicine, Department of Obstetrics and Gynecology, School of Medicine, Research Institute of Medical Science, Konkuk University, Seoul, Korea.
3 Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
4 LabGenomics Clinical Laboratories, Seongnam, Korea.